Housing construction from 4 to 1 planet is initiated by Realdania and Villum Fonden. The aim of the initiative is to strengthen the development of new, more sustainable housing. Together with the most innovative forces of the Danish building sector, the goal is to create healthy, attractive, and scale-able homes with extraordinarily low climate impacts. The ambition is to reach a carbon emission of 2,5 kg CO2 / m² / year, which is a fourth of the average climate impact of conventional new housing today